Q 11-14-026NEETJEE MainEasy
The intensity of a sound increases by a factor of $100$. The increase in its sound level is
Answer: (B) $20$ dB
Concept. Change in sound level: $\Delta L = 10\log_{10}\dfrac{I_2}{I_1}$ dB.
Step 1. Substitute.
$$\Delta L = 10\log_{10}100 = 20\ \text{dB}$$
Answer. $20$ dB (Option B).
Solution by Sreeraj P, M.Sc Physics